622552649 has 2 divisors, whose sum is σ = 622552650. Its totient is φ = 622552648.

The previous prime is 622552607. The next prime is 622552669. The reversal of 622552649 is 946255226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603586624 + 18966025 = 24568^2 + 4355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622552649 is a prime.

It is not a weakly prime, because it can be changed into another prime (622552669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311276324 + 311276325.

It is an arithmetic number, because the mean of its divisors is an integer number (311276325).

Almost surely, 2^622552649 is an apocalyptic number.

It is an amenable number.

622552649 is a deficient number, since it is larger than the sum of its proper divisors (1).

622552649 is an equidigital number, since it uses as much as digits as its factorization.

622552649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 41.

The square root of 622552649 is about 24951.0049697402. The cubic root of 622552649 is about 853.8705371707.

The spelling of 622552649 in words is "six hundred twenty-two million, five hundred fifty-two thousand, six hundred forty-nine".